

<html>
    <head></head>
    <body>
        ergiuhergiuh
        <div id="fb-root"></div>
        <script>
            window.fbAsyncInit = function() {
                FB.init({
                        appId      : '456456456',
                        status     : true, // check login status
                        cookie     : true, // enable cookies to allow the server to access the session
                        xfbml      : true  // parse XFBML
                        });
                        
                        // Here we subscribe to the auth.authResponseChange JavaScript event. This event is fired
                        // for any authentication related change, such as login, logout or session refresh. This means that
                        // whenever someone who was previously logged out tries to log in again, the correct case below
                        // will be handled.
                        FB.Event.subscribe('auth.authResponseChange', function(response) {
                                           // Here we specify what we do with the response anytime this event occurs.
                                           if (response.status === 'connected') {
                                           // The response object is returned with a status field that lets the app know the current
                                           // login status of the person. In this case, we're handling the situation where they
                                           // have logged in to the app.
                                           testAPI();
                                           } else if (response.status === 'not_authorized') {
                                           // In this case, the person is logged into Facebook, but not into the app, so we call
                                           // FB.login() to prompt them to do so.
                                           // In real-life usage, you wouldn't want to immediately prompt someone to login
                                           // like this, for two reasons:
                                           // (1) JavaScript created popup windows are blocked by most browsers unless they
                                           // result from direct interaction from people using the app (such as a mouse click)
                                           // (2) it is a bad experience to be continually prompted to login upon page load.
                                           FB.login();
                                           } else {
                                           // In this case, the person is not logged into Facebook, so we call the login()
                                           // function to prompt them to do so. Note that at this stage there is no indication
                                           // of whether they are logged into the app. If they aren't then they'll see the Login
                                           // dialog right after they log in to Facebook.
                                           // The same caveats as above apply to the FB.login() call here.
                                           FB.login();
                                           }
                                           });
            };
        
        // Load the SDK asynchronously
        (function(d){
         var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
         if (d.getElementById(id)) {return;}
         js = d.createElement('script'); js.id = id; js.async = true;
         js.src = "//connect.facebook.net/en_US/all.js";
         ref.parentNode.insertBefore(js, ref);
         }(document));
         
         // Here we run a very simple test of the Graph API after login is successful. 
         // This testAPI() function is only called in those cases. 
         function testAPI() {
             console.log('Welcome!  Fetching your information.... ');
             FB.api('/me', function(response) {
                    console.log('Good to see you, ' + response.name + '.');
                    });
         }
        </script>
        
        <!--
         Below we include the Login Button social plugin. This button uses the JavaScript SDK to
         present a graphical Login button that triggers the FB.login() function when clicked. -->
        
        <fb:login-button show-faces="true" width="200" max-rows="1"></fb:login-button>
    </body>
</html>